Darth Plagueis

Love the idea of Darth Plagueis making an appearance in The Force Awakens, so I thought I'd do a quick concept study based upon that - what would he look like? If he really has been alive and in the shadows for years, is he like a walking corpse, disfigured and diseased, barely alive? I referenced mummies, corpses, and lots of freaky stuff. Might do an alternate pass I enjoyed this so much!